Last 3some I had was with an old acquaintance, Vietnamese boy, working at Goodboys. I asked about a 3some, and he brought along his friend, Thai, also from Goodboys. They allowed me to video some of the action.
Yes, I'm aware of the dispute. It's just typical. I remember how long it took to build the first line, endless delays, and the mad idea to have only a single line at Saphan Taksin. Not exactly forward thinking. A bit like the UK, and Heathrow!
Not accurate to say Cambodia is simpler. You have to get an e-visa, plus an ETA, the latter available, on line, 7 days and fewer before you arrive. Visa costs $30 or so, ETA is free. However the online process is very efficient.
I think I'm now far to old to try it. In the old days I stayed at the Dusit, convenient for Lumpini Park, but I preferred my bedroom, with a big mirror.
What does a wet blanket sound like? Interesting concept.
However your point is a good one. You need customers, and i don't think those large semi circular booths are suitable for single guys.